* Compact regions for more efficient garbage collection and serialization

* Better support for machines with non-uniform memory architectures

* More robust support for levity (e.g. RuntimeRep) polymorphism

* A simple interface for streaming eventlog data from live processes

* Further refinement of DWARF support

Unfortunately there are still a few known issues in this release,
including a few compiler panics (#13233, #13509) and a memory leak in
the simplifier (#13426) which may adversely affect heap sizes and
compilation time for some modules. This memory leak unfortunately made
it impossible to provide a 32-bit Windows distribution for this
candidate; this will be resolved in -rc2.

As always, please let us know if you have difficulty. Thanks to everyone
who has contributed to this release!